Provided by: postfix_2.2.10-1_i386 bug

NAME

       qmqpd - Postfix QMQP server

SYNOPSIS

       qmqpd [generic Postfix daemon options]

DESCRIPTION

       The  Postfix  QMQP  server  receives  one message per connection.  Each
       message is piped through the cleanup(8) daemon, and is placed into  the
       incoming queue as one single queue file.  The program expects to be run
       from the master(8) process manager.

       The  QMQP  server  implements  one  access  policy:   only   explicitly
       authorized client hosts are allowed to use the service.

SECURITY

       The  QMQP  server  is  moderately  security-sensitive. It talks to QMQP
       clients and to DNS servers on the network. The QMQP server can  be  run
       chrooted at fixed low privilege.

DIAGNOSTICS

       Problems and transactions are logged to syslogd(8).

BUGS

       The  QMQP protocol provides only one server reply per message delivery.
       It is therefore not possible to reject individual recipients.

       The QMQP protocol requires the server to  receive  the  entire  message
       before  replying.  If  a  message  is  malformed,  or  if any netstring
       component is longer than acceptable, Postfix  replies  immediately  and
       closes  the  connection.  It  is  left  up  to the client to handle the
       situation.

CONFIGURATION PARAMETERS

       Changes to main.cf are picked up automatically, as  qmqpd(8)  processes
       run for only a limited amount of time. Use the command "postfix reload"
       to speed up a change.

       The text below provides only a parameter summary. See  postconf(5)  for
       more details including examples.

CONTENT INSPECTION CONTROLS

       content_filter (empty)
              The name of a mail delivery transport that filters mail after it
              is queued.

       receive_override_options (empty)
              Enable  or  disable  recipient  validation,   built-in   content
              filtering, or address mapping.

RESOURCE AND RATE CONTROLS

       line_length_limit (2048)
              Upon  input,  long  lines  are chopped up into pieces of at most
              this length; upon delivery, long lines are reconstructed.

       hopcount_limit (50)
              The maximal number of Received:  message headers that is allowed
              in the primary message headers.

       message_size_limit (10240000)
              The  maximal  size  in  bytes  of  a message, including envelope
              information.

       qmqpd_timeout (300s)
              The time limit for sending or  receiving  information  over  the
              network.

TROUBLE SHOOTING CONTROLS

       debug_peer_level (2)
              The  increment  in verbose logging level when a remote client or
              server matches a pattern in the debug_peer_list parameter.

       debug_peer_list (empty)
              Optional list of remote client or  server  hostname  or  network
              address  patterns  that  cause  the  verbose  logging  level  to
              increase by the amount specified in $debug_peer_level.

       soft_bounce (no)
              Safety net to keep mail queued that would otherwise be  returned
              to the sender.

TARPIT CONTROLS

       qmqpd_error_delay (1s)
              How  long  the  QMQP server will pause before sending a negative
              reply to the client.

MISCELLANEOUS CONTROLS

       config_directory (seepostconf -doutput)
              The default  location  of  the  Postfix  main.cf  and  master.cf
              configuration files.

       daemon_timeout (18000s)
              How  much  time  a  Postfix  daemon process may take to handle a
              request before it is terminated by a built-in watchdog timer.

       ipc_timeout (3600s)
              The time limit for sending  or  receiving  information  over  an
              internal communication channel.

       max_idle (100s)
              The  maximum  amount of time that an idle Postfix daemon process
              waits for the next service request before exiting.

       max_use (100)
              The maximal number  of  connection  requests  before  a  Postfix
              daemon process terminates.

       process_id (read-only)
              The process ID of a Postfix command or daemon process.

       process_name (read-only)
              The process name of a Postfix command or daemon process.

       qmqpd_authorized_clients (empty)
              What clients are allowed to connect to the QMQP server port.

       queue_directory (seepostconf -doutput)
              The location of the Postfix top-level queue directory.

       syslog_facility (mail)
              The syslog facility of Postfix logging.

       syslog_name (postfix)
              The  mail  system  name that is prepended to the process name in
              syslog  records,  so  that   "smtpd"   becomes,   for   example,
              "postfix/smtpd".

       verp_delimiter_filter (-=+)
              The  characters  Postfix accepts as VERP delimiter characters on
              the Postfix sendmail(1) command line and in SMTP commands.

SEE ALSO

       http://cr.yp.to/proto/qmqp.html, QMQP protocol
       cleanup(8), message canonicalization
       master(8), process manager
       syslogd(8), system logging

README FILES

       Use "postconf readme_directory" or "postconf html_directory" to  locate
       this information.
       QMQP_README, Postfix ezmlm-idx howto.

LICENSE

       The Secure Mailer license must be distributed with this software.

HISTORY

       The qmqpd service was introduced with Postfix version 1.1.

AUTHOR(S)

       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA

                                                                      QMQPD(8)